Mower-wheel.



J. H. AUBLE & H. A. BARRETT.

MOWER WHEEL.

APPLICATION FILED we. 13, 1900.

2 SHEETSBHBET 1.

[HYEZYfDJ'CSZ Patented Sept. 20, 1910.

J. H. AUBLE &-H. A. BARRETT.

MOWER WHEEL.

APPLICATION IILIJD AUG.13, 1909.

o; m 8m 0 f m W m W 5 M 5 5 w y THE NaHRIs PETERS c0, wnsmncrorl, n. c

UNITED STATES PATENT OFFICE.

JAMES H. AUBLE AND HARRY A. BARRETT, OF CINCINNATI, OHIO.

MOWER-WHEEL.

Specification of Letters Patent. I Patented Sept. 20, 1910- Applicationfiled August 13, 1909. Serial No. 512,637.

To all whom it may concern:

Be it known that we, JAMES H. AUBLE and HARRY A. BARRETT, citizens ofthe United States, and residents of Cincinnati, Hamilton county, Stateof Ohio, have invented certain new and useful Improvements inMower-Wheels; and we do declare the following to be a clear, full, andexact description thereof, attention being called to the accompanyingtwo sheets of drawings, with the reference characters marked thereon,which form also a part of this specification.

In halm cutting-devices like lawn and field-mowers, there are certaintypes in which the cutting means are actuated by reciprocatory elements,moved by annular camgrooves of zig-zag shape formed or contained withinthe driving-wheels. To produce these annular grooves in a. metallicsurface and of proper and accurate shape is not so readily accomplishedand the object of our invention is to provide means and a constructionwhereby wheels so grooved may be manufactured in proper manner andfurnished as an article of manufacture within reasonable expense-limits.

In the following specification and particularly pointed out in theclaims at the end thereof, will be found a full description of ourinvention, together with its manner of use, parts and construction,which latter is also illustrated in the accompanying two sheetsofdrawings, in which.

Figure 1, shows the wheel edgewise with parts broken away. Fig. 2, is afragmentary side-elevation with parts broken out and shown in a sectionas indicated by line 22 in Fig. 3. F i 3, is an internal View of thewheel-rim an of adjacent parts some of which are partly broken away.Fig. 4, is a similar view with some of these adjacent parts removed.Fig. 5, shows a portion of one of the parts used to form the camgroove.Figs. 6, 7 and 8, are sectional profile views of modified constructionof the grooved wheel-rim. Fig. 9, is a top-view of'part of the wheel-rimshown in Fig. 8.

The construction of this wheel is so devised as to make the use ofsheet-metal possible and we prefer to use this material accordingly,although metal in other forms is not excluded. The outer face or treadof the shell is formed by an annular rim A, which is provided withoutwardly extending, short teeth, or climbers a which serve to promotethe traction and prevent slipping. They are produced by forming angularcuts in the metal of the rim between its edges and by turning part ofthe separated metal outwardly as shown. Means upon which the rim ismounted are provided which mi ht be an axle in which case spokes areused etween the two. In lawn-mowers a closed disk as shown at C usuallytakes the place of spokes, it being connected to the rim and preferablyto the outer edge thereof. The inside of the wheel, especially inlawnmowers, is usually closed likewise by another disk D, which howeverhas no connection with any parts of the wheel and is stationary withreference to it. It also serves as a frame and supportsthe cutting meansand the mechanism for operating them and which mechanism in turn isoperated by the cam-grooved wheel. The details concerning theconstruction and manner of support of this disk as well as of disk C,and the formation of the axle-bearing in this latter and the manner ofsupporting the wheelrim, form no essential features of this in vention.

The annular cam-groove E, of zig-zag shape is provided inside of thewheel, its function being to actuate the mechanism whereby the cuttingdevices of the implement are erated and which mechanlsm (not shownl isusually supported on the stationary disk D. The immediate engagement ofthis mechanism with the groove is usually by means of a roller carriedby the former and which, while prevented from moving around with thewheel-rim, is so supported as to be free to move transversely.

with reference to this latter. The reciprocating motion necessary forthe operation of the implement is thus imparted to the roller and by itto the cutting mechanism.

The particular shape of the cam-groove, its pitch, that is the number ofits alternate turns with reference to the circumference of the wheel,are matters which are governed by the nature of the particular operatingmechanism used in connection therewith and have no bearing on theparticular construction of the groove to be now described.

The opposite sides 6 e of the groove are each formed by one edge ofstrips F, which strips are each bent to the form of a circle of a sizepermitting them to be placed inside of the wheel-rim. These edges areshaped as shown in Fig. 5, which might be described as serrated ortoothed. To form the groove, two of these strips are placed edgewiseopposite each other inside of the wheel in this manner that a tooth f ofone strip extends into the space between two teeth of the opposite stripas best shown in Fig. 3, and with a space between them, which spaceconstitutes cam-groove E. The width of these strips, together with thegroove-forming space between them is such that they may be readilyreceived between the edges of the rim. Circumferentially considered, weprefer. to make each strip of one piece, although they may also be madeup in sections. WVe prefer to oin the ends of'these strips where theyare widest and as shown at 12 in Fig. 3. The strips so placed must besecured to maintain their position with reference to each other, that isproperly spaced to maintain the width of the cam-groove, and they mustalso be held against slipping circumferentially within the wheel. Rivets13 passing through these strips and through the wheel-rim as shown inFlgs. 3 and 6, form an efiicientmedium for this purpose. I111 creaseddepth may be. obtained for the groove by placing spacing means in shapeof washers 14 between rim and strips, the rivets serving also to holdthem in place as shown in Fig. (5.

In Figs. 7, 8 and 9, possibility of the application of this constructionto wheels having a rounded edge or face is illustrated. Increased depthof the groove may be ob.- tained by the use of spacing means as beforedescribed and shown in Figs. 6 and 7.

In Fig. 8, another manner of holding strips F in position is shown whichconsists of producing a projection 15 on the outer side ofstrips F,which form the groove and which projections are fitted to be received bysockets 16, formed in the wheel-rim. Both these formations are producedby depressing the metal accordingly. The particular shape considered inthe circumferential plane of the rim is shown in Fig. 9 and is such asto fix the position of strips F circumferentially as well astransversely so that they are held immovable in both directions. Theouter side of these sockets serves to form the teeth or climbers adescribed before. By making the extent of the projections such as to behigher than the depth of the sockets, strips F will be spaced from theinner side of the wheel-rim to increase the depth of groove E the sameas is done by washers 14L.

In Figs. 1 to 5, similar projections are shown but of different shapeand as indicated at 15*. Complementary sockets 16 for them are formed ina similar manner, but in an independent member instead of in cam-grooveis governed by the character of the mechanism which is actuated thereby,we prefer to. form the groove so that the particular member actuatedthereby moves asv near as possible with a constant speed at all timesand without a drag particularly in those parts of the groove laterallyfarthest apart and where the motion changes from one in one direction,to one in opposite direction. For such purpose that part of the sidewhich is inner-most at the turns of the groove and formed by the toothedportions 7 of the strips is formed with an acute angle. The result isthat the roller or the particular element fitted to the groove,movesfrom one part thereof quickly into the other part and is reversedin motion without drag. Otherwise the edges of strips F, forming thesides of the groove, particularly in the form shown in Figs. 7 an 8,should be so. shaped that they fit snugly against the member moved bythem, to prevent binding or lost motion between the engaged parts. Acamgroove so constructed is not necessarily lim: ited to use inconnection with mower-wheels, as suggested, but may be used in any connection where rotary motion is to be converted into, reciprocatorymotion.

Having described our invention, we claim as new 1. As an article ofmanufacture, a hollow wheel-body for a wheel to actuate the cuttingmechanism of a mower and which is;pro.- vided with a zigzag shapedcam-groove, the sides of which are formed. by the complementarilyshaped, opposite longitudinal edges of two spaced strips, projectionsformed on these strips and complementary sockets provided inside of thewheel to which these projections are fitted and whereby these strips areheld in position.

2. In an article of manufacture, the combi-.

nation with the rim of a wheel to. actuate.

the cutting mechanism of a mower, of two. strips placed. inside of thisrim with a space between their opposite longitudinal. edges,

which edges are shaped to form the oppo-v placed with a space betweentheir opposite longitudinal edges, which edges are shaped to form theopposite sides of a zig-zag shaped cam-groove, and an intermediateannular member held between these strips and the wheel-rim, there beingcomplementary projections and sockets to receive them, on these stripsand on the intermediate member, whereby the strips are held in positionwithin the wheel.

4. As an article of manufacture, a hollow wheel-body for a wheel toactuate the cutting mechanism of a mower and which is provided with azig-zag shaped cam-groove, the sides of which are formed by the comlementary shaped, opposite longitudinal ec ges of two spaced strips,projections formed on these strlps and complementary sockets providedinside of the wheel to which these projections are fitted and wherebythese strips are held in position, the height of the pro ections beingin excess of the depth of the sockets so as to space the strips from thewheel.

5. In an article of manufacture, the combination with the sheet-metalrim of a wheel to actuate the cuttin mechanism of a mower which isprovided with spaced depressions on its inside which form projections onits outerside constituting climbers, of two annular strips which haveprojections fitted to these depressions and whereby these strips areheld in position with a space between their opposite longitudinal edgeswhich latter are shaped to form the opposite sides of a zig-zag shapedcam-groove.

In testimony whereof, we hereunto aflix our slgnatures in presence oftwo witnesses.

Witnesses:

C. SPENGEL, T. Ln BEAU.

